Can I store a helmet in the seat?ekobikesekobikes8:02 amSeptember 27th, 2017 Can I store a helmet in the seat? Yes, all our mopeds will take a helmet of some sort but it depends on the size of the helmet etc. 0 For the electric bikes and mopeds to be road tax free, do they have to have a max speed of 12.5mph? The product I want mentions there is no black box, can one be attached?